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2 Sheets-Sheet 1. M. WHELESS. ELECTRIC ARG LAMP.

PatentedMay 5, 18961 (No Model.)

(No Model.) 2 Sheets-Sheet 2.

M. WHELESS.

ELECTRIC ARG LAMP.

No. 559,649. Patented May 5, 1896.

ANDREW E GRAHAM PHOTO LPr-1D WASHINGTON DC UNITED STATES PATENT OEEICE.

MALONE VI'IELESS, OF VASIIINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO THEVHELESS ELECTRIC LAMP COMPANY, OF SAME PLACE.

'ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 559,649, dated May 5,1896.

Application filed January 29, 1896x Serial No. 577,804. (No model.)

To @ZZ whom it may concern: inclosed in -a globe A of any suitable kind.

Be it known that I, MALONE WHELEss, of That shown in the drawings is ofthe same gen- Va-shington city, in the District of Colum` eral type asthat of the well-known Pintsch bia, have invented certain new and usefulImlamp, now so generally inuse on railway-cars,

5 provements in Electric-Arc Lamps, of which the lower part of theglobe, made of glass or 55 the following is a specification. yothertranslucent or transparent material, be-

My invention has relation to feed and reguing hinged on a horizontalaXis to a metallic lating devices of an electric-arc lamp, such dome, inwhich is an outwardly-opening reas set forth in my allowed applicationfiled lief-valve a to give vent to the heated and 1o December 7,1895,Serial No. 571,379, on which expanded air. The feed-regulating works of6o Letters Patent will issue of even date herethe lamp extend downthrough this dome. with-that is to say, devices comprising a These worksconsist in the main of the cenfeed magnet or magnets in the arc-circuitof tral tubular carbonfholder B for the upper the lamp and feedmechanism controlled movable and positive carbon X, the two solen- 15thereby in combination with aregulator-magoids C, the tubular stems c,and the rods d, 65 net, also included in said circuit eitherdivertically movable in said stems, attached at rectly or in a shuntthereto, a shunt or short their upper ends to the cores of the solenoidscircuit around the arc and feed and regulator and at their lower ends toopposite ends of magnets completed through either one of two the yoke orcross-bar e, provided with a cen- 2o sets of contacts controlled by theregulatortral hub or sleeve e', fitting and vertically 7o magnet,according as the potential of the arcmovable on the outer carbon-holderI3. The circuit materially exceeds or falls below the yoke by links f isattached to the arms of normal. gripping-cams g, pivoted in a sleeve g',fitting The invention refers to certain improveand vertically movableupon the carbon- 2 5 ments designed to enable the lamp to be used holderand adapted to workthrough slots I) 75 more conveniently in either anarc or an inin the carbon-holder against the carbon X candescentelectric circuit, or in other words therein. Stop-rings 72., one aboveand one whether connected up in circuit, in series, or below the sleeveg and adjustable upon the in multiple; and also to means by which thecarbon-holder B, limit the extent to which 3o lamp will be more surelyshort-circuited in the sleeve can move up and down thereon. 8o event ofthe upper carbon dropping below the At the lower end of thepositive-carbon feed or gripping devices, as it may do when holder is adisk i', of asbestos or other refracit has been nearly all consumed.tory material, to shield the works from the The improvements will firstbe described heat and from carbon deposit.

3 5 by reference to the accompanying drawings, The works above the globeA are sur- 85 and will then be more specifically pointed out rounded bya ventilated shell D, attached to in the claims. the closed case E, onthe floor of which are In the drawings, Figure l is a sectional sidesecured the feed and regulator magnets. elevation of a lamp embodying myimprove- The stems c are attached at their upper 4o ments. Fig. 2 :is asectional side elevation of ends to the under side of the floor of caseE 9o the same at right angles to the plane of eleand at their lower endsto the top of the vation in Fig. l. In this gure a portion of dome ofthe globe A. the counterweight mechanism is obscured in The currententers the lamp at the bindn order not to conceal the parts. Fig. 3 isan ing-posts F and leaves it at the binding- 45 enlarged section on line3 3, Fig. l. Fig. 4 is post F.

a section on line e 4, Fig. 3, illustrative of Attached to the floor ofthe case E is the the regulator-magnet and its appurtenances. usualmanually-operated cut-out switch G, Fig. 5 is a diagram of the circuitconnections having one contact, 7c, connected to bindingof the lamp.post F and the other contact, 7c', connected to 5o The arc orlight-givin g part of the lamp is binding-post F. XVhenever the twocontacts 1oo are in electrical communication through the movable memberof the switch, the current passes through them and the binding-postswithout going through the lamp. The countcrweight for facilitating thelifting action of the feed-magnet consists of a rolling weight havingthe form of a flanged roller, which runs on and is held in a track-likelever m. This track is fast to a cross-piece n, pivoted at o in asuitable bracket or hanger O, attached to and depending from the dome ofglobe A, as seen in Fig. 2. From the trackformed counterweighted leverthus arranged project forward to steady pins p beneath yoke e, one on'each side of the hub e. One only of these pins is indicated in Fig. 1.

The regulator-magnet is shown at H, having armature-lever H', pivoted atl and ccnnected at or near one end to the core 2 of solenoid H. At itsother end is an insulated contact 3, which plays between the twostationary contacts 4 5. The armature-lever is provided with a weight s,which has the saine function as the similarly-lettered spring in myaforesaid application, Serial No. 571,37 9.

Y is the lower carbon, and Y is its holder.

The contacts 3 4 5, as seen in Fig. 5, are in a shunt 9 around the are,the feed solcnoids, and the regulator-magnet, the two fixed contacts 4 5being in parallel in said shunt-circuit.

The are or lamp circuit is shown at 7. The regulator-magnet H isenergized from the arccircuit, not directly, but bya high-resistanceshunt-circuit S, in which it is included.

A resistance R, as in my aforesaid application, is included in theshunt-circuit 9 around the arc and the feed and regulator magnets. Underthis arrangement whenever the potential of the current in the arccircuitmaterially exceeds or falls below the normal the shunt-circuit 9 will beclosed between one or the other set of contacts, as the case may be.

In order to adapt the lamp to be conveniently used either in an arc orin an incandescent circuit, I arrange things so that the lamp itselfshall contain all the accessories needed to permit it to be used ineither connection. To this end I provide it with a resistance R', (inaddition to the coil R already described,) which can be connected up ornot in the lamp-circuit, as desired. The resistance R' is typified inthe diagram Fig. 5 as consisting of three coils. It and the resistance Rare contained in a receptacle R2 on top of the lamp, and means areprovided by which the resistance R can be cut into or out of thelamp-circuit. These means are typied in Fig. 5 as a shunt o around theresistance R and a switch 1 by which the shunt may be opened or closed,as desired. In practice, however, connections will be provided by whichthe binding-post F can be connected or not to the resistance R, asdesired. This resistance is proportioned to the standard currentemployed on an incandescent circuit, and is used only when the lamp isplaced in multiple in such a circuit. Then the lamp is used as a serieslamp, the resistance R is cut out. By this convenient arrangement thelamp in itself contains all the accessories which enable it to be put toeither use without further preparation Vhen the upper carbon is nearlyused up, there remains but a short stick. NVhen still further consumed,it will finally, in dropping,

get below and out of control of the grippingcams g. This stub will thenrest permanently upon the lower carbon, thus permanently closing thelamp-circuit, and, through the consequent energizing of theregulatormagnet, holding the shunt 9 open. To prevent any suchoccurrence, I provide in the upper-carbon holder an inner lining t ofinsulating material, such as asbestos, which extends up far enough toinsulate from the holder any piece of carbon short enough to fall belowand out of reach of the grippingcams g. The shunt S, in which theregulator-magnet is included, is in this instance around the arc, and toprevent the current under these conditions from passing over the shunt Iprovide a cut-out 10 ll in said circuit connected to and operated by thefeed mechanism in such manner as to open the regulator-circuit wheneverthe upper carbon is not between the gripping-cams. In any such eventthere is nothing to offer resistance to an abnormal descent of thecross-head e, and I avail of this abnormal movement to open the circuit8 of the regulator-magnet. To this end the circuit 8 is closed through afixed contact 1l, Fig. 2, and a movable contact l0, which is pivoted ato to the counterweighted lever-supporting hanger O, and extends acrossand rests upon the cross-head c. The two contacts are always inelectrical connection so long as the conditions in the lamp are normal,but whenever the cross-head descends abnormally low the contact l0 willbe free to drop, and will do so, thus separating from contact H andbreaking the circuit 8.

Having described my improvements and the manner in which the same is ormay be carried into effect, what I claim, and desire to secure byLetters Patent, is-

l. The feed magnet or magnets included in the arc-circuit of the lampand the feed mechanism controlled thereby, in combination with theregulator-magnet included in a high-resistance shunt from that circuit,and a shuntcircuit around the arc and the feed and regulator magnets,completed through either one of two sets of contacts, controlled by theregulator-magnet, according as the potential of the arc-circuitmaterially exceeds or falls below normal, substantially as hereinbeforeset forth.

2. In an electric lamp, and in combination, the lamp-circuit, thefeed-magnets included therein, the regulator-magnet energized from thelamp-circuit, the shunt around the arc IOO IIO

IZO

and the feed and regulator magnets completed through eitherone of twosets of contacts controlled by the regulator-magnet, the resistance Rand means whereby the same may be excluded from or included in thelamp-circ uit at will so as to adapt the lamp for use in either an areor an incandescent circuit, substant-ially as and for the purposeshereinbefore set forth.

3. In combination, the resistances R R mounted in and carried by thelamp, the lamp-circuit including the feed-magnets, the regulator-magnetenergized from the lampcircuit, the shunt around the arc and the feedand regulator magnets containing the resistance R and completed througheither one of two sets of contacts controlled by the regulator-magnet,and means for including the resistance R in, or cutting it out from, the

lamp-circuit as desired, substantially as and for the purposeshereinbefore set forth.

4. The combination of the feed mechanism, the lamp-circuit including thefeed-magnets, the regulator-magnet in a shunt to the lampcircuit, theshunt-circuit around the arc and the feed and regulator magnets,completed through either one of two sets of contacts controlled by theregulator-magnet, and a circuit-breaker connected to and operated fromthe feed mechanism to open the circuit of the regulator-magnet, at thetime and in the manner, substantially as hereinbefore set forth.y

In testimony whereof I have hereunto set my hand this 28th day 0fJanuary, 1896.

MALONE VVHELESS.

Witnesses:

FREDERIC B. KEEFER, EWELL A. DICK.

